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| Number | Title | Issue Date |
| 7915987 | Acoustic noise reduction in power supply inductors Embodiments of the present invention provide an apparatus that reduces an audible noise produced in a power supply. The apparatus includes: (1) a housing; (2) an inductor coil formed from a coil of wire enclosed in the housing; (3) a set of wires that are coupled fr... | 03/29/2011 |
| 7199495 | Magnetoelectric devices and methods of using same The operational frequency of existing magnetoelectric materials having metallic or ceramic magnetostrictive materials and ceramic piezoelectric materials may be limited to a few kilohertz due to the presence of eddy-current losses in the metallic magnetostrictive ph... | 04/03/2007 |
| 7193495 | Magnetically influenced current or voltage regulator and a magnetically influenced converter A magnetically influenced current or voltage regulator includes a body of an anistropic magnetisable material that provides a closed, magnetic circuit. A first electrical conductor is wound around the body along at least a part of the closed circuit for at least one... | 03/20/2007 |
| 7180396 | Superconducting current limiting device with magnetic field assisted quenching The present invention relates to a superconducting current limiting device comprising a superconductor component (1) wherein each superconductor component (1) comprises a superconductor body (2) on which a coil (3) is wound the coil being... | 02/20/2007 |
| 7161454 | Apparatus and method for cooling electrical transformers A transformer assembly includes a transformer having a winding, a thermal sensor in thermal communication with the transformer winding, and an airflow generator in signal communication with the thermal sensor and arranged for fluid communication with the transformer... | 01/09/2007 |
| 7117898 | Guide rods for a Jacquard loom A guide rod assembly for a Jacquard loom is described which is narrower (10 mm or less), instead of 13 mm of conventional guide rods. This reduction in width is attained reducing the overall height of the magnet system integrated in the guide rod. The magnet system ... | 10/10/2006 |
| 6965290 | Low harmonic rectifier circuit Non-linear inductor(s) are used to reduce the percent total harmonic distortion of the harmonics in the line currents in the input side rectifier system of an ac drive system. Several constructions for the non-linear inductor(s) are described. The non-linear inducto... | 11/15/2005 |
| 6956749 | Switching power supply circuit A switching power supply circuit includes a converter transformer in which an output obtained by switching a direct current voltage of a converter through resonance is transmitted from the primary side to the secondary side. The switching power supply circuit furthe... | 10/18/2005 |
| 6942523 | Filtered electrical connector with ferrite block combinations and filter assembly therefor A filtered electrical connector with ferrite block combinations and a filter assembly therefor are disclosed. More particularly, the filtered electrical connector includes a connector housing made of an electrically insulating material, at least two terminals each h... | 09/13/2005 |
| 6933822 | Magnetically influenced current or voltage regulator and a magnetically influenced converter A magnetically influenced current or voltage regulator includes a body of an anisotropic magnetisable material that provides a closed magnetic circuit. A first electrical conductor is wound around the body along at least a part of the close circuit for at least one ... | 08/23/2005 |
| 6547596 | Filtered electrical connector with ferrite member and coil The design of the present invention compiles EMI protection of two formerly separated filtering devices (coil and ferrite beads) in one optimal packaging. It consists of a coil wound around a cylindrical tubular ferrite bead and welded at one end to the t... | 04/15/2003 |
| 6437675 | Linear coil acoustic noise inhibiting A linear coil for inhibiting acoustic noise is provided. A rubber spacer is disposed in addition to the conventional linear coil. By means of the spacer, the vibration, generated when the deflection current passes through the linear coil, is absorbed. As ... | 08/20/2002 |
| 6177855 | Transformers having closed ferrite magnetic circuits A transformer, comprising: a closed ferrite magnetic circuit having an air gap; a rigid component filling a portion of the air gap; and, a flexible material filling the remainder of the air gap to substantially absorb vibrations of the ferrite. In the cas... | 01/23/2001 |
| 6114934 | Variable linearity coil A variable linearity coil has a coil which is wound around a first core, a permanent magnet for charging a bias magnetic field to the first core, a bias magnetic field adjusting coil which is wound around a second core, and an electrically insulating base... | 09/05/2000 |
| 6087917 | Power magnetic device and method of manufacture therefor A package for an electronic device, the electronic device including a body having a cavity therein, the body subject to stress from imposition of forces. The package includes a conforming compressible material disposed within at least a portion of the cav... | 07/11/2000 |
| 6028500 | Audible noise suppressor for planar magnetic devices The audible noise suppressor for planar magnetic devices functions to eliminate the audible noise generated by the normal operation of a planar magnetic device. This is accomplished by the use of a spacer device which functions to fill the gap between the... | 02/22/2000 |
| 5939965 | Inductive component with variable magnetic performance An inductive component with variable magnetic properties. A magnetic field is inductively generated in a magnetic core by an electrical winding. Electrode coatings are provided on the magnetic core and an electrical field or current is impressed into the ... | 08/17/1999 |
| 5815059 | Coaxial isolation mounting of a toroidal transformer A toroidal shaped transformer having two levels of structureborne noise isolation is disclosed. A 30-60 dB reduction in noise is achieved by isolation mounting the toroidal transformers coaxially on a central support rod which in turn is supported by an i... | 09/29/1998 |
| 5726617 | Electrical transformer with reduced core noise An electrical transformer includes a tank containing transformer fluid and a transformer core and winding subassembly located in the transformer fluid within the tank. The electrical transformer also includes a mechanism for varying the dynamic pressure o... | 03/10/1998 |
| 5724017 | Electrical transformer with reduced core noise An electrical transformer includes a housing, a transformer core and winding subassembly located within the housing, and an active mount subassembly having an active mount and a controller. The active mount has a first end attached to the housing and a se... | 03/03/1998 |
| 5710533 | Electrical transformer with reduced fan noise An electrical transformer includes a housing, a transformer core and winding subassembly located in the housing, and a cooling fan subassembly. The cooling fan subassembly includes a variable speed fan located outside the housing, a temperature sensor loc... | 01/20/1998 |
| 5682292 | Liquid-cooled valve reactor The invention relates to a liquid-cooled valve reactor, in particular for a high-voltage DC transmission installation, including a reactor core (2) and a reactor coil (4), the reactor coil (4) including a primary winding (24), which comprises two cooled w... | 10/28/1997 |
| 5619174 | Noise filter comprising a soft magnetic alloy ribbon core A noise filter includes an annular magnetic core made of a soft magnetic alloy ribbon mainly made of Fe and containing B and at least one element selected from a group consisting of Ti, Zr, Hf, Nb, Ta, Mo and W, at least 50% of the soft magnetic alloy str... | 04/08/1997 |
| 5566047 | Electrical apparatus with noise-suppressing feature Disclosed is an AC electrical apparatus including a vibrating device and a mounting structure supporting the device. In the improvement, a resilient insulator is interposed between the device and the mounting structure so that vibrations are isolated from... | 10/15/1996 |
| 5184104 | Electromagnetic induction apparatus with a sound suppressing arrangement An electromagnetic induction apparatus includes a tank having a bottom plate and containing an electrical device which vibrates during operation. The tank is supported by supporting members disposed between the tank bottom plate and a floor surface to def... | 02/02/1993 |
| 5072158 | Silent lamp igniter The present invention comprises a transformer having a magnetic core that is smaller and shorter than the winding form for the primary and secondary coils, the core is surrounded by an sound deadening and insulating material, such as foam, and is encased ... | 12/10/1991 |
| 5025241 | Transformer of ferrite closed magnetic circuit type The present invention concerns a transformer of the ferrite closed magnetic circuit type, with a gap. The gap is filled with a mastic such as the polysulphide or polyurethane mastics having a Shore hardness with constant behaviour as a function of tempera... | 06/18/1991 |
| 4859977 | Insulator device for power transformer An insulator device to be inserted between a power transformer and a conductive chassis. Insulative washers are monolithically formed with the spacer. One washer is formed for each screw holding the transformer to the chassis. Each washer has a cylindrica... | 08/22/1989 |
| 4849728 | Induction generator The invention provides an iduction generator comprising a plastic injection-molded housing having a port and one or more pole shoe(s) associated with a permanent magnet. A plastic bobbin inserted into the port and having a coil wound thereon which, throug... | 07/18/1989 |
| 4800306 | Device for damping the oscillations of a stepping motor The device comprises an external inertia element which is fixed to a damping member which is coaxially fixed with respect to a shaft of a stepping motor, in such a way that it can rotate together therewith. The external inertia element comprises a metal m... | 01/24/1989 |
| 4724413 | Low-noise transformer A low-noise transformer, particularly for the use as an output transformer of an inverter, comprising a sound-proof envelope surrounding at least one of the windings for absorbing or screening noise originating from vibration due to electromagnetic force.... | 02/09/1988 |
| 4639672 | Nuclear magnetic resonance apparatus Inside the gradient coils in the magnet system of a nuclear magnetic resonance apparatus there is arranged a sleeve which forms a noise-absorbing shield between the gradient coils and the measurement space. The shield is preferably formed by an evacuated ... | 01/27/1987 |
| 4558296 | Sound damping devices A hollow sound damping plate is arranged between a transformer core and an internal limiting surface of a transformer tank filled with insulating fluid. At least one compressive-force transmitting spring member (8) is arranged between the front wall (6) a... | 12/10/1985 |
| 4514714 | Noise-reduction device for stationary induction apparatus A noise-reduction device for a stationary induction apparatus which device comprises a sound insulation panel attached to reinforcing channels provided at the periphery of a tank of the stationary induction apparatus so as to block noises emitted from the... | 04/30/1985 |
| 4497387 | Transformer with smooth-walled tank Transformer having an active part thereof disposed in an oil-filled, smooth-walled tank having side walls braced by ribs secured by welding and subdivided into wall-high panels, the panels, respectively, including a sheetmetal wall having a resonance freq... | 02/05/1985 |
| 4464644 | Procelain-clad electrical machine with vibration-on-transportation suppression A transformer is fixed between two electrically insulating plates extending through a hollow porcelain tube connected at both ends to an upper and a lower tank through packings respectively and two compression controlled helical springs are disposed in th... | 08/07/1984 |
| 4460884 | Transformer comprising a magnetic screen A transformer including a lamination core of band iron and a magnetic screen which consists of a wound iron band arranged around the lamination core (5) and which is secured to the core by means of expansion wedges provided in the space between the core a... | 07/17/1984 |
| 4456900 | High frequency coil A high frequency coil including an inductance device formed by fitting a pair of electrode caps at both ends of a ferrite magnetic core wound by a winding on a peripheral surface of the core; a heat resistant electric insulating coated layer formed on the... | 06/26/1984 |
| 4449110 | Device for chocking an inverted type current transformer when transported on its side A device for chocking an inverted type current transformer when transported on its side. It comprises at least one jack (12) within the metal enclosure (1) but operable from outside the latter and disposed, during transportation of the transformer on its ... | 05/15/1984 |
| 4442419 | Static induction apparatus A static induction apparatus including a vessel for containing a main body of the static induction apparatus, a plurality of reinforcing support members secured to side plates of the vessel and a sound reducing structure. The sound reducing structure incl... | 04/10/1984 |
